TY - JOUR
T1 - Precise determination of manganese in steel by dc glow discharge optical emission spectrometry associated with voltage modulation technique
AU - Wagatsuma, Kazuaki
AU - Kodama, Kenji
AU - Park, Hyunkook
N1 - Funding Information:
The authors gratefully acknowledge financial support by grants from The Iron and Steel Institute of Japan and by a grant from KAWASAKI Steel 21st. Century Foundation. A part of this research is supported by Grant-in-Aids from the Ministry of Education, Science, Sports and Culture of Japan (No. 15560705).
PY - 2004/1/30
Y1 - 2004/1/30
N2 - A voltage modulation technique was applied for the precise and accurate determination of manganese in steels in dc glow discharge optical emission spectrometry. Emission signals from the glow discharge plasma are modulated by a cyclic variation of the discharge voltage so that only the desired signals can be detected at very low noise levels by using a lock-in amplifier. Mn determination in low-alloyed steels was performed to estimate the repeatability of the analytical result. For each measurement, the relative standard deviation (R.S.D.) of the intensities of the Mn I 403.08-nm line was ca 0.1% when a steel sample containing 0.329mass% Mn was employed. Averaging all analytical values, which are obtained in various discharge conditions, yields statistical information on the precision and accuracy of the analytical values obtained. The relative error from the recommended value is calculated to be 0.5%. The R.S.D. over the analytical values is 1.5%, representing the overall analytical performance of this technique.
AB - A voltage modulation technique was applied for the precise and accurate determination of manganese in steels in dc glow discharge optical emission spectrometry. Emission signals from the glow discharge plasma are modulated by a cyclic variation of the discharge voltage so that only the desired signals can be detected at very low noise levels by using a lock-in amplifier. Mn determination in low-alloyed steels was performed to estimate the repeatability of the analytical result. For each measurement, the relative standard deviation (R.S.D.) of the intensities of the Mn I 403.08-nm line was ca 0.1% when a steel sample containing 0.329mass% Mn was employed. Averaging all analytical values, which are obtained in various discharge conditions, yields statistical information on the precision and accuracy of the analytical values obtained. The relative error from the recommended value is calculated to be 0.5%. The R.S.D. over the analytical values is 1.5%, representing the overall analytical performance of this technique.
KW - Glow discharge optical emission spectrometry
KW - Manganese
KW - Precision
KW - Repeatability
KW - Steel
KW - Voltage modulation
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U2 - 10.1016/j.aca.2003.10.005
DO - 10.1016/j.aca.2003.10.005
M3 - Article
AN - SCOPUS:0346433760
VL - 502
SP - 257
EP - 263
JO - Analytica Chimica Acta
JF - Analytica Chimica Acta
SN - 0003-2670
IS - 2
ER -